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Globorotalia mckannai White 1928 from: Bolli, H.M. (1957): The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
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Anonymous: Unedited TaxonConcept data
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Species Globorotalia mckannai White 1928


Alternative name:
Diagnosis / Definition:
Bolli (1957):
Shape of test low trochospiral, umbilical side strongly inflated; equatorial periphery nearly circular, slightly lobate; axial periphery rounded. Wall calcareous, perforate, finely spinose. Chambers inflated, slightly compressed laterally; 12-16, arranged in 2-3 whorls, the 5-7 chambers of the last whorl increasing moderately in size. Sutures on spiral side oblique, depressed; on umbilical side, radial, depressed. Umbilicus narrow, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Coiling random. Largest diameter of figured hypotype 0.35 mm.
Discussion / Comments:
Bolli (1957):
The species is moved to the genus Globorotalia because of the interiomarginal, extraumbilical umbilical position of the aperture. G. mckannai (White) is possibly related to G. tortiva Bolli, new name, from which it is distinguished by having more chambers in the last whorl.
Systematics:

20
 Genus Globorotalia
  Species Globorotalia velascoensis
Synonym list:
Bolli (1957):
1928 Globigerina mckannai White. - White : p. 194 pl. 27, figs. 16a-c
1957 Globorotalia mckannai White. - Bolli : pl. 19, figs. 16-18
Was used in synonym list of:
References:

White,M.P. (1928):
Some index foraminifera of the Tampico embayment of Mexico, Part 2 . Journal of Paleontology Vol. 2(4) p. 280-313

Bolli,H.M. (1957):
The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
Anonymous: Unedited TaxonConcept data
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